JEE Main
- Exam
- JEE Main
- Subject
- Physics
- Chapter
- Magnetic Properties of Matter
JEE Main · Physics · Magnetic Properties of Matter
A deflection magnetometer is placed with its arm along the...
A deflection magnetometer is placed with its arm along the east-west direction ( position) and a short bar magnet is placed symmetrically along its axis at some distance with its north pole pointing towards east. In this position the needle of the magnetometer shows a deflection of . If we double the distance of the bar magnet, then the deflection will be
Options
- A
- B
- C
- D
Correct answer
C.
Step-by-step solution
For a short bar magnet in tan A position,
...(i)
When distance is doubled, then new deflection is given by,
....(ii)
{\theta}^{′} = \tan^{- 1}$ \left[\dfrac{\sqrt{3}}{8}\right]
...(i)
When distance is doubled, then new deflection is given by,
....(ii)
{\theta}^{′} = \tan^{- 1}$ \left[\dfrac{\sqrt{3}}{8}\right]